Retrieves the current state of the request operation.
HRESULT value = object.get_readyState(* p);
The object has been created, but not initialized (the IHTMLXMLHttpRequest::open method has not been called).
A request has been opened, but the IHTMLXMLHttpRequest::send method has not been called.
The IHTMLXMLHttpRequest::send method has been called. No data is available yet.
All the data has been received.
- XMLHttpRequest, Section 3.5
You cannot call IHTMLXMLHttpRequest::responseBody and IHTMLXMLHttpRequest::responseText properties to obtain partial results (IHTMLXMLHttpRequest::readyState = 3). Doing so will return an error, because the response is not fully received. You must wait until all data has been received.
In comparison, the Microsoft XML (MSXML) version of the IXMLHTTPRequest interface exposes partial results through the responseStream property, which the Windows Internet Explorer native version does not implement. Be aware that this behavior also differs from the IServerXMLHTTPRequest interface, which provides partial results to IHTMLXMLHttpRequest::responseBody and IHTMLXMLHttpRequest::responseText.
IHTMLXMLHttpRequest::readyState was introduced in Windows Internet Explorer 7.